the active window is the window that is currently being used, while the inactive window is any window(s) that is in the background.
活动窗口是当前正在使用的窗口,而任何非活动窗口的窗口(县),在背景中。
using these classes you can change the background colour and the text font and colour of both the active and inactive window captions independently for any windows you choose.